ci : add --fail to curl download and propagate

This commit adds the --fail option to the model download scripts so that
if the model download returns a server error this is picked up. This is
then detected in run.sh and a error message is displayed and the script
stops and returns an error.

The motivation for this is that currently it is possible for the model
download to fail but this script proceeds and instead of a model file
the contents will be an html page probably with the error. This will
then cause the model to not be able to load due to a missing magic
number. I'm not sure we can do much about the downloading failing,
perhaps a retry but at least this will give a clearer error message.

Refs: https://github.com/danbev/whisper.cpp/actions/runs/26866349389/job/79230794512

Author: danbev

ci/run.sh

@@ -152,7 +152,12 @@ function gg_download_model {
         mkdir -p "$MNT/models"
         cd "$MNT/models"
         bash "$cwd/models/download-ggml-model.sh" ${model_name} .
+        local download_status=$?
         cd "$cwd"
+        if [ $download_status -ne 0 ]; then
+            echo "Error: failed to download model ${model_name}"
+            ret=1
+        fi
     fi
 }
 

models/download-ggml-model.sh

@@ -120,7 +120,7 @@ fi
 if [ -x "$(command -v wget2)" ]; then
     wget2 --no-config --progress bar -O ggml-"$model".bin $src/$pfx-"$model".bin
 elif [ -x "$(command -v curl)" ]; then
-    curl -L --output ggml-"$model".bin $src/$pfx-"$model".bin
+    curl -L --fail --output ggml-"$model".bin $src/$pfx-"$model".bin
 elif [ -x "$(command -v wget)" ]; then
     wget --no-config --quiet --show-progress -O ggml-"$model".bin $src/$pfx-"$model".bin
 else